Piping pressure

[Erlend Åmdal]

Any pumping action should have a max pressure parameter which indicates how far it can travel through a pipe. During a pumping action every gas pipe will be exposed to a pressure equal to the block distance traveled.

In addition, each pipe type will have a maximum pressure property. If the pipe experiences pressure greater than its maximum pressure, it can randomly break.

• Add an API function for registering Gas pipe types.
• Add an IGasCarrier interface that BlockGasPipe will implement.
• Rework piping system to support this.